"Bootstrap 4 Number Spinner"
Bootstrap 4.1.1 Snippet by mdwaris198

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<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<script src="https://kit.fontawesome.com/a076d05399.js"></script>
<div class="container mt-5">
<div class="row">
<div class="col-md-4"></div>
<div class="col-md-4">
<h4>Bootstrap 4 Number Spinner</h4>
<hr>
<div class="input-group mb-3 number-spinner">
<div class="input-group-prepend">
<button class="btn btn-danger" data-dir="dwn" type="button"><i class="fas fa-minus"></i></button>
</div>
<input type="text" class="form-control text-center" value="1">
<div class="input-group-append">
<button class="btn btn-danger" data-dir="up" type="button"><i class="fas fa-plus"></i></button>
</div>
</div>
</div>
<div class="col-md-4"></div>
</div>
</div>
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$(document).on('click', '.number-spinner button', function () {
var btn = $(this),
oldValue = btn.closest('.number-spinner').find('input').val().trim(),
newVal = 0;
if (btn.attr('data-dir') == 'up') {
newVal = parseInt(oldValue) + 1;
} else {
if (oldValue > 1) {
newVal = parseInt(oldValue) - 1;
} else {
newVal = 1;
}
}
btn.closest('.number-spinner').find('input').val(newVal);
});
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Related: See More

BLK• Design System
Simple input spinner controls
Input Spinner with min and max values
Bootstrap Number Spinner

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